Alectinib for Patients with ALK Rearrangement–Positive Non–Small Cell Lung Cancer and a Poor Performance Status (Lung Oncology Group in Kyushu?1401)

摘要

Abstract Introduction Alectinib has shown marked efficacy and safety in patients with anaplastic lymphoma receptor tyrosine kinase gene ( ALK ) rearrangementpositive NSCLC and a good performance status (PS). It has remained unclear whether alectinib might also be beneficial for such patients with a poor PS. Methods Eligible patients with advanced ALK rearrangementpositive NSCLC and a PS of 2 to 4 received alectinib orally at 300 mg twice daily. The primary end point of the爏tudy was objective response rate (ORR), and the most爄nformative secondary end point was rate of PS improvement. Results Between September 2014 and December 2015, 18 patients were enrolled in this phase II study. Of those patients, 12, five, and one had a PS of 2, 3, or 4, respectively, whereas four patients had received prior crizotinib treatment. The ORR was 72.2% (90% confidence interval: 52.985.8%). The ORR did not differ significantly between patients with a PS of 2 and those with a PS of 3 or higher (58.3% and 100%, respectively [ p ? 0.114]). The PS improvement rate was 83.3% (90% confidence interval: 64.893.1%, p 0.0001), with the frequency of improvement to a PS of 0 or 1 being 72.2%. The median progression-free survival was 10.1 months. Toxicity was mild, with the frequency of adverse events of grade 3 or higher being low. Neither dose reduction nor withdrawal of alectinib because of toxicity was necessary. Conclusions Alectinib is a treatment option for patients with ALK rearrangementpositive NSCLC and a poor PS.